FNF50560TD1 Datasheet, PDF (10/15 Pages) Fairchild Semiconductor – Motion SPMR 55 Series

Time Charts of Protective Function
Input Signal
Protection
Circuit State
Control
Supply Voltage
RESET
SET
UV_DDR
a1
UVDDD
a3
a2
a4
RESET
a6
a7
Output Current
a5
Fault Output Signal
a1 : Control supply voltage rises: After the voltage rises UV_DDR, the circuits start to operate when next input is applied.
a2 : Normal operation: IGBT ON and carrying current.
a3 : Under voltage detection (UV_DDD).
a4 : IGBT OFF in spite of control input condition.
a5 : Fault output operation starts.
a6 : Under voltage reset (UV_DDR).
a7 : Normal operation: IGBT ON and carrying current.
Figure 10. Under-Voltage Protection (Low-Side)
Input Signal
Protection
Circuit State
Control
Supply Voltage
RESET
UV_BSR
b1
UV_BSD
b2
SET
b3
b4
RESET
b5
b6
Output Current
High-level (no fault output)
Fault Output Signal
b1 : Control supply voltage rises: After the voltage reaches UV_BSR, the circuits start to operate when next input is applied.
b2 : Normal operation: IGBT ON and carrying current.
b3 : Under voltage detection (UV_BSD).
b4 : IGBT OFF in spite of control input condition, but there is no fault output signal.
b5 : Under voltage reset (UV_BSR)
b6 : Normal operation: IGBT ON and carrying current
Figure 11. Under-Voltage Protection (High-Side)
(with the external shunt resistance and CR connection)
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10
FNF50560TD1 Rev. 1.0
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